Mixing-machine.



E. A. CLARK.

MIXING MACHINE.

APPLICATION FILED sEPT.24. 1913.

1,158,178. Patented Oct. 26, 1915.

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7&1 ATTORNEY COLUMBIA PLANOGRAPH c0.,\vAsmNGToN. D. c.

UNITED STATES PATENT OFFICE.

ELMER A. CLARK, OF JULIET, ILLINOIS.

MIXING-MACHINE.

Application filed September 24, 1913.

To all whom it may concern Be it known that I, ELMER A. CLARK, a citizenof the United States, and a resident of Joliet, county of Will, andState of Illinois, have invented certain new and useful Improvements inMixing-Machines, of which the following is a specification.

My invention relates in general to mixing machines and in particular tomixing machines operated by power to mix dough or other materials ofvarying consistencies. Although the mechanism disclosed particularly isadapted for the uses above set forth, it is applicable equally to alltypes of machines where it is desired to obtain the advantageous resultswhich flow from its structural advantages.

In mixing machines of the type chosen to illustrate my invention,numerous expedients have been tried to facilitate the changing of thebeater and to render the mixture bowl readily accessible and easilyremovable. These expedients have failed to meet the required condition,owing either to their slow method of operation, to their inaccessiblefixed position at the front of the machine, or in many instances to boththese defects. My new improvements comprise a device which has beenfound in practice to work rapidly, accurately, and positively, and whichpermits the bowl to be swung freely in any direction to that point whereit is most readily accessible. The particular combination which I havechosen to illustrate my improvements is disclosed in the accompanyingdrawings wherein:

Figure 1 is a perspective of a portion of a mixing machine, showing thering yoke or bowl support in intermediate position; and Fi 2 is anelevation of a modification of a detail.

Similar reference numerals refer to similar parts throughout thedrawings.

Reference character 1 indicates the column or standard of the mixer,reference character 2 the ring yoke or bowl support, and referencecharacter 3 the ring yoke cap which is secured to the ring yoke in anysuitable manner as by bolts 4:. The ring yoke and its cap, which may beintegral or in two or more pieces as desired, are shaped to fit easilyaround the column 1 so that the ring yoke may swing freely in ahorizontal plane in a complete circle. The

Specification of Letters Patent.

Patented Oct. 26, 1915.

Serial No. 791,527.

vertical movement of the ring yoke may be limited, if desired, bycollars 5.

Vertical movement of the ring yoke may be obtained by any well knownmechanical movement, an efficient mode consisting of a raising or crossbar 7, connecting rod 8, crank pin 9, crank 10, shaft 11, and handle 12,all connected in well known manner to raise and lower the raising bar 7by throwing the handle. The parts are so proportioned and adjusted thatwhen the raising bar 7 is in raised position, the crank pin 9, will havecrossed the dead center of the parts and the crank 10 will rest againsta suitable stop as the inner side of the column, thereby preventing theraising bar 7 from returning to lowered position irrespective of theweight it carries unless first the handle 12 be thrown sufficiently tomove the crank 10 away from the wall of column 1 and crank pin 9 beyonddead center. The raising pin 7 in the present illustrative combination,preferably may consist of two or more extensions arranged beneath thering yoke 2 and its cap 3, and extending through slots provided for thatpurpose in the column 1, one of which slots is indicated by referencecharacter 6. It will be noted that the slot 6 extends sufficiently belowthe lower ring 5 to allow the ring yoke 2 and its cap 3 to rest directlyon the lower collar 5 in order to furnish a broad bearing surface onwhich they may swing. This latter feature is unnecessary if anyequivalent structure be adopted to contact with and raise the ring yoke2 and its cap 3, such as a circular piece connected with the connectingrod 8 in place of or in conjunction with the raising pin or pins 7.

To prevent swinging of the ring yoke 2 when in operative position asuitable locking device is provided which may consist of a taperedrecess 141 in the ring yoke 2, adapted to receive a correspondingtapered pin 15 on the column 1. Fig. 2 indicates a modification in whichthe tapered pin 15 is replaced by a roller 16 and the tapered recess 1ais replaced by a cam groove 17.

The operation of the device is obvious. When in raised, operativeposition, at which time the beating of the mixture takes place in wellknown manner, the ring yoke 2, and its cap 3 support the bowl firmly andpositively in predetermined position. When it is desired to change thebeater, to remove the bowl from the ring yoke 2, or to render the bowlaccessible, the handle 12 is thrown over, thereby lowering the ring yoke2, in

which position it may be swung in a horizontal plane to any pointdesired. No adjustment is necessary, the operation of the 'mechanismfrom dust or from splashings from the mixture bowl.

Many modifications will be apparent to those skilled in the art, myinvention not being limited to the particular means chosen to illustrateit, but consisting broadly of means to raise and lower themixture bowland at the same time permit it to be moved readily to an accessibleposition.

Having thus disclosed one embodimentoli my invention what I claim anddesire to protect by Letters Patent is:

1. In a mixing machine, a bowl support member, a member for revolublysupporting said bowl support member, means to raise and lower said bowlsupport member, and means to prevent said bowl support member fromrevolving when in raised position comprising a projection on one of saidmembers adapted to enter a recess provided on the other of said memberswhen said bowl support member is in raised position.

2. In a mixing machine, a bowl support member, a member forrevolubly-supporting said bowl support member, means to raise and lowersuch bowl support member, and means to prevent said bowl support memberfrom revolving when in raised position comprising a roller on oneof-said members adapted to engage with a cam sured to revolve thereon,and means to raise andlower said bowl support comprising a 7 barextending through said slot.

l. In a mixing machine, a bowl support, means for revolubly supportingsaid bowl support, means to raise and lower said bowl support comprisinga crank adapted to be supported beyond dead center when the bowl supportis in raised position, and means so to support said crank.

5. In a mixing machine, a bowl support, and means for raising andlowering said bowl support comprising means to engage with said bowlsupport, a connecting rod engaging said last-named means, a crankconnected with said connecting rod, and a handle connected with saidcrank.

6. In a mixing machine, a bowl support, a hollow column having acylindrical bearing surface provided with a collar on which said bowlsupport is adapted to rest and rotate and with a slot extending belowsaid collar, and a bar extending through said slot and adapted to raisesaid support, and means to raise and lower said bar.

7. In a mixing machine, a bowl support, means for revolubly supportingsaid bowl support, and means to raise and lower said bowl supportadapted to be entirely disconnected from said bowl support when thelatter is in lowered position.

ELMER A. CLARK.

' /Vitnesses:

' PETER D. MOTTA, GEO. DE HART.

Copies of this patent maybe obtained for five cents each, by addressingthe Commissioner of Patents, Washington, 1). c.

